Great idea, Jen! Susie, I like your teen/tween ideas. Thank you!
I want to add to my list
learn to make pizza on the grill
homemade ice cream
visit some new parks in our county
practice cooking with DS - I want him to learn to make a few things.
use some of the outdoor toys we bought and haven't used - horseshoes I think and some kites.
More ideas (geared towards tweens/teens):